I see a power offset on E5052B SSA baseband receiver. I am applying -40dBm 100 KHz in to baseband receiver and I am gettin -76dBm. The power offset on the screen is set to 0dB.
I can switch the internal gain between 0 to 30dB, but the amplitude is always the same.
My first assumption was the the receiver is damaged, however I have other SSA including E5052A that have baseband receiver and I see same amplitude.
From where the offset come? And why it is there?
My assumption is that the power detected on base band receiver should show real power.